Portable hot air heater



FIG. 1 is a front elevational view of a portable hot air heater showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken-line showing of a fuel gas bottle in FIGS. 1, 2, 3, and 5, is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portable hot air heater, as shown and described. 